A Radioactive Source Has a Half-Life of 2 Min

question 24

Multiple Choice

A radioactive source has a half-life of 2 min.At time t = 0 it is placed near a detector and the counting rate is observed to be 3000 counts/s.The counting rate at t = 4 min will be

• A)1500 counts/s
• B)750 counts/s
• C)375 counts/s
• D)188 counts/s
• E)94 counts/s

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Definitions:

Inelastic

A characteristic of a good or service whose demand or supply is relatively unresponsive to changes in price.

Elastic

A characteristic of a product or service that indicates its demand or supply significantly changes with a change in price.

Unit Elasticity

A situation where a change in the price of a product leads to a proportional change in the quantity demanded or supplied.

Demand

The quantity of a good or service that consumers are willing and able to purchase at a given price over a specified period of time.